CN2752316Y - Assembly of steel bridge surface - Google Patents
Assembly of steel bridge surface Download PDFInfo
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- CN2752316Y CN2752316Y CN 200420057904 CN200420057904U CN2752316Y CN 2752316 Y CN2752316 Y CN 2752316Y CN 200420057904 CN200420057904 CN 200420057904 CN 200420057904 U CN200420057904 U CN 200420057904U CN 2752316 Y CN2752316 Y CN 2752316Y
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Abstract
The utility model relates to an assembly of a steel bridge surface. The assembly of a steel bridge surface comprises a steel plate of a steel bridge surface and an asphalt concrete layer. The utility model is characterized in that the steel plate (4) of a steel bridge surface is welded with studs (8), the steel plate (4) of a steel bridge surface is laid with a lightweight concrete layer (1) mixed with steel fiber, and the lightweight concrete layer (1) mixed with the steel fiber is positioned at the lower side of a neutral shaft (7) of element lightweight concrete. A reinforcement wire and a bar mat (2) are positioned in the lightweight concrete layer (1) mixed with the steel fiber, and an element lightweight concrete layer (5) is arranged between the lightweight concrete layer (1) mixed with the steel fiber and the asphalt concrete layer (9). The utility model can solve effectively the technical problem that the asphalt surface layer generates rut, movement and engagement universally existing in the paving of the present steel bridge surface, improves obviously the pavement performance of the paving layer of a steel bridge surface and prolongs the service life of a steel bridge.
Description
Technical field
The utility model belongs to the bridge engineering field, is specifically related to a kind of steel box girder bridge face assembly.
Background technology
The steel bridge face because have easy construction, from characteristics such as heavy and light, economic provinces and more and more widely be applied to the long-span bridge beam, domestic and international existing a large amount of bridges have used this bridge deck structure form.Paving steel bridge deck generally is meant lays the thick asphalt surface course of 10cm on steel plate, combine by cementing agent between bridge floor and the asphalt surface course.Under the summer high temperature condition, the temperature of steel bridge face will reach about 60 ~ 80 ℃, cause binding material to lose efficacy because of softening, the bituminous concrete bad stability, particularly very easily cause steel bridge face and asphalt surface course unsticking under the effect of traction engine at vehicular load, asphalt surface course produces and passes, gathers around diseases such as bag, rut, reduces the pavement performance of bridge floor the most at last, increase maintenance cost, can cause the generation of traffic engineering accident when serious.At present, nearly all steel box girder bridge has all run into above-mentioned serious problems in summer, even above-mentioned disease does not appear in some bridge in service life, but they all are this effects that just obtains under the prerequisite that the restriction traction engine passes through.This problem has been the expert and the confessed global problem of scholar of this area.
At the problems referred to above, mainly solve at present: pouring asphalt concrete, pitch mastic compound, modified epoxy pitch and double-deck asphalt Matrix mixing material SMA (Stone MasticAsphalt) by four kinds of pavement technique schemes and pavement material.These four kinds schemes of mating formation all have characteristics separately, but all do not have well to solve the existing problem of present paving steel bridge deck.Particularly double-deck SMA (assembly) mats formation and uses morely in recent years at home, and it destroys all is because the cementing agent performance is not good, produces sliding rupture under the effect of interface shearing.Once some design department also taked some other pavement material and technology, as replace the bituminous mixture layer with concrete, but because this mode had both increased the deadweight of bridge floor, simultaneously ordinary concrete bullet mould height, fragility are big, the layer of mating formation produces brittle failure easily and destroys under the effect of heavy duty and dynamic load, and then influence the service behaviour of bridge floor, thereby this kind scheme does not achieve the desired result.
Summary of the invention
At the problem that exists in the above paving steel bridge deck, the purpose of this utility model is to provide a kind of good steel bridge face assembly of pavement performance that has.
To achieve these goals, the technical solution of the utility model is: a kind of steel bridge face assembly, it comprises steel bridge face steel plate, asphalt concrete layer, it is characterized in that: be welded with peg 8 on the steel bridge face steel plate 4, the light weight concrete construction layer 1 of mixing steel fibre is equipped with on steel bridge face steel plate 4 upper berths, the light weight concrete construction layer 1 of mixing steel fibre is positioned at the natural axis 7 times of plain light weight concrete construction, compressor wire and steel mesh reinforcement 2 are positioned at the light weight concrete construction layer 1 of mixing steel fibre, mix between the light weight concrete construction layer 1 of steel fibre and the asphalt concrete layer 9 to be provided with plain light weight concrete construction layer 5.
The utility model is provided with light weight concrete construction and plain light weight concrete construction (not mixing the light weight concrete construction of the steel fibre) layer of mixing steel fibre between asphalt concrete layer and steel bridge face steel plate 4, light weight concrete construction and the plain light weight concrete construction of mixing steel fibre has from heavy and light, toughness height, anti-deformation is good, modulus of elasticity is low, impermeability is good, insulation and characteristics such as heat insulation, can effectively solve the layer of mating formation cracking, pass, embrace and problem such as waterproof; Simultaneously, on steel bridge face steel plate 4, peg is set, applying the compressor wire form at inside concrete makes steel plate more firm with the layer combination of mating formation, the consistent distortion, opposing starts, improve the service behaviour and the mechanical property of steel plate-concrete combination layer, promptly improved pavement performance, solved the problem of present existence effectively.
The utlity model has following characteristics:
(1) mats formation at steel plate and bituminous mixture and lay light weight concrete construction and the plain light weight concrete construction layer of mixing steel fibre between the layer, have from heavy and light, modulus of elasticity is low, toughness is high, anti-deformation is good, anti-permeability performance is good, heat insulation, closely knit high-performance light composite layer, effectively overcome present paving steel bridge deck ubiquity and shortcoming such as easily passed, ftracture, embrace; Existing 1 cube heavy 2400 kilograms, 1 cube heavy 1950 kilograms on the light weight concrete construction of mixing steel fibre of the present utility model and plain light weight concrete construction layer are compared every cube light 50 kilograms with existing;
(2) at surface of steel plate the shearing resistance peg is set, has effectively stoped the generation of layer of mating formation because of traction engine and the following problems such as passing that produce of dynamic load effect.Simultaneously, peg is to connect steel plate and concrete transition element, strong assurance the steel plate and consistent the distortion and collaborative work of mating formation layer, the synthetic operation usefulness of raising combination layer;
(3) in light composite material, mix fiber and steel mesh reinforcement, improve mechanical properties of concrete, toughness properties and anti-deformation;
(4) concrete is applied prestressing force, improve the concrete non-deformability.
Description of drawings
Fig. 1 is the mat formation job practices figure of combination layer of the utility model
Fig. 2 is the utility model peg arrangement diagram
Fig. 3 is the utility model peg structure chart
Fig. 4 is a structural representation of the present utility model
Among the figure: 1---mix the light weight concrete construction layer of steel fibre, be positioned at below the natural axis; 2---compressor wire and steel mesh reinforcement, be anchored on the stretching bed seat with special-purpose ground tackle, the steel mesh reinforcement colligation is on peg; 3---stretching bed seat, adopt welding manner to be welded on the steel plate; 4---steel bridge face steel plate, the top board of orthotropic steel case beam, thickness is 12cm; 5---plain light weight concrete construction layer, do not mix steel fibre, be positioned at more than the natural axis; 6---ground tackle, special-purpose prestress anchoraging instrument; 7---the natural axis of plain light weight concrete construction; 8---peg, adopt the arc pulling type welding to be welded on the steel plate; 9---asphalt concrete layer; The overall height of H---peg; H
0---the height that peg emits; H
1---the height of peg shaft; φ
1---the diameter that peg emits; φ
2---the diameter of peg shaft; L
1---the horizontal spacing of peg, 600mm 〉=L
1〉=6 φ
2L
2---the longitudinal pitch of peg, 600mm 〉=L
2〉=6 φ
2
The specific embodiment
As shown in Figure 4, a kind of steel bridge face assembly, it comprises steel bridge face steel plate 4, asphalt concrete layer 9, be welded with peg 8 on the steel bridge face steel plate 4, the light weight concrete construction layer 1 of mixing steel fibre is equipped with on steel bridge face steel plate 4 upper berths, the light weight concrete construction layer 1 of mixing steel fibre is positioned at the natural axis 7 times of plain light weight concrete construction, and compressor wire and steel mesh reinforcement 2 are positioned at the light weight concrete construction layer 1 of mixing steel fibre, mixes between the light weight concrete construction layer 1 of steel fibre and the asphalt concrete layer 9 to be plain light weight concrete construction layer 5.
Describedly mix the light weight concrete construction layer 1 of steel fibre and the gross thickness of plain light weight concrete construction layer 5 is S, 50mm≤S≤80mm.
As Fig. 2, shown in Figure 3, the height of described peg is H, and the diameter of peg shaft is φ
2, and 0.95S 〉=H 〉=4 φ are arranged
2The horizontal spacing of peg is L
1, longitudinal pitch is L
2, and should satisfy 600mm 〉=L
1〉=6 φ
2, 600mm 〉=L
2〉=6 φ
2
Described compressor wire is the 1/3-1/2 place of mixing the gross thickness S of the light weight concrete construction layer 1 of steel fibre and plain light weight concrete construction layer 5 from the height of steel plate 4 upper surfaces.
Steel mesh reinforcement is the 40%-50% that mixes the gross thickness S of the light weight concrete construction layer 1 of steel fibre and plain light weight concrete construction layer 5 from the height of steel plate 4 upper surfaces.
The described thickness of mixing the light weight concrete construction layer 1 of steel fibre is 30 ~ 50mm, and the thickness of plain light weight concrete construction layer 5 is 20 ~ 30mm.
The paving method of above-mentioned steel bridge face assembly comprises the steps:
1. the light weight concrete construction and the plain light weight concrete construction of preparation of steel fibre mixed in preparation:
A. the light weight concrete construction of steel fibre is mixed in preparation: the light weight concrete construction of mixing steel fibre is mainly by water, pretreated light aggregate, cement, fine aggregate, the silicon ash, high efficiency water reducing agent FDN, steel fibre and water-soluble polymer are formed, by ratio of weight and the number of copies: water: pretreated light aggregate: cement: fine aggregate: silicon ash=1: 3.00 ~ 3.50: 2.90 ~ 3.50: 3.80 ~ 3.95: 0.15 ~ 0.40, high efficiency water reducing agent FDN presses 0.8 ~ 1.4 of cement consumption %, steel fibre is by 0.1 ~ 1.5 of the light weight concrete construction volume % that mixes steel fibre, and water-soluble polymer is pressed 10 ~ 20 of cement consumption %; Above-mentioned component stirred make compound, promptly get product.
Performance indications are as follows:
| The initial slump/cm | Compressive strength/MPa | Rupture strength/MPa/28d | Toughness index η 30 | Permeability resistance | Coefficient of thermal conductivity/W/mK | Do apparent density/kg/m 3 | |
| 7d | 28d | ||||||
| 16~18 | ≥40 | ≥50 | ≥6.8 | ≥23.0 | More than the P12 | 0.8~1.2 | ≤1950 |
Prepare plain light weight concrete construction (not mixing the light weight concrete construction of steel fibre): plain light weight concrete construction mainly is made up of water, pretreated light aggregate, cement, fine aggregate, silicon ash, high efficiency water reducing agent FDN and water-soluble polymer, by ratio of weight and the number of copies: water: pretreated light aggregate: cement: fine aggregate: silicon ash=1: 3.00 ~ 3.50: 2.90 ~ 3.50: 3.80 ~ 3.95: 0.15 ~ 0.40, high efficiency water reducing agent FDN presses 0.8 ~ 1.4 of cement consumption %, and water-soluble polymer is pressed 10 ~ 20 of cement consumption %; Above-mentioned component stirred make compound, promptly get product.
Described cement is 42.5# or 52.5# Portland cement.
Described silicon ash specific area is greater than 2000m
2/ kg.
Described fine aggregate is a river sand, and fineness modulus is 2.6 ~ 2.8.
Described pretreated coarse aggregate is: particle diameter 5-20mm, apparent density 1200-1500kg/m
3, bulk density 700-1100kg/m
3, the leca of cylindrical compress strength 〉=6.5Mpa or haydites of book structure or lytag soak 24 ~ 72h before using in water.
Described water reducing agent FDN is: naphthalene sulfonic salt FDN series of high efficiency water reducing agent, water-reducing rate is 10-30%.
Described fiber is the end hook type steel fibers, and draw ratio is 55 ~ 65, and length is 30 ~ 35mm;
Described water-soluble polymer is modified polyacrylic acid base polymer emulsion or modified polyvinylalcohol base polymer emulsion, and solid content is 55% ~ 65%.
2. steel bridge face preliminary treatment
(1) derusting by sandblasting
At first check steel bridge face outward appearance,, should eliminate by polishing if any welding slag, splash and burr etc.; Its less important bridge floor with derusting by sandblasting carries out pre-clean processes, carries out cleaning surfaces with giant or surface cleaner, removes surface of steel plate because the pollutions such as dust and dirt, oil and grease that cause behind the procedure; At last, treat the surface of steel plate drying after, the beginning derusting by sandblasting, the strict control of processing temperature is higher than 3 ℃ of dew points, relative humidity should≤80%, in case of weather such as raining or snow, should forbid the operation that eliminates rust.
(2) rust prevention by applying liquid material lacquer and tack coat
In order to prevent that steel plate is secondary polluted, should finish the spraying of zinc rich primer after 4 hours in derusting by sandblasting.Shoulder guard realizes by water-proof tack coat with layer good binding of mating formation, and it is to spray cementing agent performing on the steel plate of rust preventive painting.
3. the welding of peg
Adopt arc pulling type stud welding method weld stud 8 on the steel bridge face, 12/min of stud welding frequency, fusion penetration are 2 ~ 3mm, and peg specification and arrangement are seen Fig. 2, Fig. 3.The height of peg is H, and the diameter of shaft is φ
2, the light weight concrete construction layer and the plain light weight concrete construction layer gross thickness of mixing steel fibre are S, and 0.95S 〉=H 〉=4 φ are arranged
2The horizontal spacing of peg is L
1, longitudinal pitch is L
2, and should satisfy 600mm 〉=L
1〉=6 φ
2, 600mm 〉=L
2〉=6 φ
2
The colligation of steel mesh reinforcement
4. the bar diameter of steel mesh reinforcement is selected according to the light weight concrete construction layer thickness, and the mesh specification is 100 * 100mm.The material LL550 level cold rolled reinforcing steel bar with ribs of steel mesh reinforcement.The steel mesh reinforcement of welding fabrication is tied up notch place at the peg shaft by steel wire, steel mesh reinforcement is positioned at natural axis below 7, steel mesh reinforcement is the 40%-50% that mixes the gross thickness S of the light weight concrete construction layer 1 of steel fibre and plain light weight concrete construction layer 5 from the height of steel plate 4 upper surfaces, make the tensile region of steel mesh reinforcement, improve concrete tensile strength and cracking resistance at light weight concrete construction.
5. the selection of compressor wire and prestressed applying:
Compressor wire: compressor wire adopts the less cold drawn steel wire of diameter, and its tensile strength is 1470 ~ 1670MPa.
As shown in Figure 1, tensioning process: compressor wire be positioned at natural axis below 7 with steel mesh reinforcement with the layer, compressor wire is the 1/3-1/2 place of mixing the gross thickness S of the light weight concrete construction layer 1 of steel fibre and plain light weight concrete construction layer 5 from the height of steel plate 4 upper surfaces, take pre-tensioning system to apply prestressing force, control stress for prestressing is taken as 40%f
Ptk, f wherein
PtkBe the limit tension stress of compressor wire (not getting 70% is the crack to occur because consider the excessive excessive or prestretching district of member antiarch that will cause of prestressing force).The welding angle bar is pressed the stretch-draw muscle bundle of design code as stretching bed seat 3 on the steel plate 4, and with ground tackle 6 anchoring temporarilies, concreting (mixing the light weight concrete construction of steel fibre) again.Treat concrete strength reach design strength 70% after, put and open, allow muscle Shu Huili.
The spacing of compressor wire: the spacing of prestressed reinforcement is not less than its nominal diameter or equivalent diameter 1.5 times, and for heat tempering bar and steel wire, its spacing should be less than 15mm.
6. mix the light weight concrete construction of steel fibre and mating formation of plain light weight concrete construction
The light weight concrete construction layer 1 of mixing steel fibre that paves on the steel bridge face steel plate 4 (is a lower floor, be positioned at natural axis below 7), mixing the plain light weight concrete construction layer 5 that paves on the light weight concrete construction of steel fibre (is the middle level, be positioned at more than the natural axis), the thickness of mixing the light weight concrete construction layer 1 of steel fibre is 30 ~ 50mm, and the thickness of plain light weight concrete construction layer 5 is 20 ~ 30mm.
7.SMA preparation (for existing mature technology):
(1) raw-material preparation
Pitch: select heavy pyrobitumen for use modification AH-50 or AH-70 number, have the good temperature resistance energy;
Gather materials: basalt, Lopa Nationality shirt rock abrasion value is less than 30%, and faller gill shape content is less than 20%, with the pitch adhesion stress be 5 grades, maximum particle diameter is less than 16mm;
Breeze: levigate limestone;
Fiber: adopt the chemical fibre high temperature resistant, that modulus of elasticity is high, Derain nit AS flexible pavement dedicated fiber;
(2) preparation of high-performance bituminous concrete
The high-performance bituminous concrete by pitch, gather materials, breeze, fibrous, be existing mature technology; The set of dispense of gathering materials composition and division in a proportion sees Table 2.
Table 2 aggregate grading
| Sieve aperture | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 0.6 | 0.3 | 0.075 |
| Percent of pass | 100 | 85~95 | 65~75 | 20~28 | 16~24 | 12~16 | 12~15 | 8~10 |
Annotate: zero bitumen aggregate ratio 6.0 ~ 6.2% 0 fibers content is 0.3%
(3) asphalt concrete layer 9 (being the upper strata) that paves on the plain light weight concrete construction layer 5.
The road surface maintenance can be used after 5-15 days.
Claims (6)
1. steel bridge face assembly, it comprises steel bridge face steel plate, asphalt concrete layer, it is characterized in that: be welded with peg (8) on the steel bridge face steel plate (4), the light weight concrete construction layer (1) of mixing steel fibre is equipped with on steel bridge face steel plate (4) upper berth, the light weight concrete construction layer (1) of mixing steel fibre is positioned under the natural axis (7) of plain light weight concrete construction, compressor wire and steel mesh reinforcement (2) are positioned at the light weight concrete construction layer (1) of mixing steel fibre, mix between the light weight concrete construction layer (1) of steel fibre and the asphalt concrete layer (9) to be provided with plain light weight concrete construction layer (5).
2. a kind of steel bridge face assembly according to claim 1 is characterized in that: described light weight concrete construction layer and plain light weight concrete construction layer gross thickness of mixing steel fibre is S, 50mm≤S≤80mm.
3. a kind of steel bridge face assembly according to claim 1, it is characterized in that: the height of described peg is H, the diameter of peg shaft is φ
2, the light weight concrete construction layer and the plain light weight concrete construction layer gross thickness of mixing steel fibre are S, and 0.95S 〉=H 〉=4 φ are arranged
2The horizontal spacing of peg is L
1, longitudinal pitch is L
2, and should satisfy 600mm 〉=L
1〉=6 φ
2, 600mm 〉=L
2〉=6 φ
2
4. a kind of steel bridge face assembly according to claim 1 is characterized in that: described compressor wire is the 1/3-1/2 place of mixing the gross thickness S of the light weight concrete construction layer (1) of steel fibre and plain light weight concrete construction layer (5) from the height of steel plate (4) upper surface.
5. a kind of steel bridge face assembly according to claim 1 is characterized in that: steel mesh reinforcement is the 40%-50% that mixes the gross thickness S of the light weight concrete construction layer (1) of steel fibre and plain light weight concrete construction layer (5) from the height of steel plate (4) upper surface.
6. a kind of steel bridge face assembly according to claim 1 is characterized in that: the described thickness of mixing the light weight concrete construction layer (1) of steel fibre is 30 ~ 50mm, and the thickness of plain light weight concrete construction layer (5) is 20 ~ 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420057904 CN2752316Y (en) | 2004-12-21 | 2004-12-21 | Assembly of steel bridge surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420057904 CN2752316Y (en) | 2004-12-21 | 2004-12-21 | Assembly of steel bridge surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2752316Y true CN2752316Y (en) | 2006-01-18 |
Family
ID=35913725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420057904 Expired - Fee Related CN2752316Y (en) | 2004-12-21 | 2004-12-21 | Assembly of steel bridge surface |
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| Country | Link |
|---|---|
| CN (1) | CN2752316Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255713A (en) * | 2013-05-17 | 2013-08-21 | 长沙理工大学 | Cement concrete bridge floor composite pavement structure |
| CN103726444A (en) * | 2014-01-03 | 2014-04-16 | 江苏省交通科学研究院股份有限公司 | Multilayer type super-thick light steel bridge deck pavement structure and pavement method |
| CN104612049A (en) * | 2015-01-21 | 2015-05-13 | 大连理工大学 | Bridge floor reinforcing pavement layer by adoption of lightweight concrete |
-
2004
- 2004-12-21 CN CN 200420057904 patent/CN2752316Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255713A (en) * | 2013-05-17 | 2013-08-21 | 长沙理工大学 | Cement concrete bridge floor composite pavement structure |
| CN103255713B (en) * | 2013-05-17 | 2015-11-18 | 长沙理工大学 | A kind of cement concrete bridge floor composite pavement structure |
| CN103726444A (en) * | 2014-01-03 | 2014-04-16 | 江苏省交通科学研究院股份有限公司 | Multilayer type super-thick light steel bridge deck pavement structure and pavement method |
| CN103726444B (en) * | 2014-01-03 | 2015-09-23 | 江苏省交通科学研究院股份有限公司 | A kind of multiple field super thick lightweight bridge deck pavement structure and paving method |
| CN104612049A (en) * | 2015-01-21 | 2015-05-13 | 大连理工大学 | Bridge floor reinforcing pavement layer by adoption of lightweight concrete |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060118 Termination date: 20100121 |